% !Mode:: "TeX:UTF-8"%確保文檔utf-8編碼
\documentclass[tikz,border=2pt]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\begin{document}
\usetikzlibrary{circuits.ee.IEC}

\begin{tikzpicture}[circuit ee IEC]
\node[battery] (battery) at(0,3) {};
\node[make contact,info=S] (contact1) at(2,3) {};
\draw (battery) -- (contact1);
\node[draw,circle,inner sep =1pt] (A) at (3,1.5) {\footnotesize A};
\draw (contact1) -| (A);
\node[bulb,info=L1] (L1) at (-1,0){};
\node[bulb,info=L2] (L2) at (1.5,0){};
\node[contact,info=c] (c) at (2.5,0) {};
\draw (L2) -| (A);
\draw (L1) -- (L2);
\node[contact,info'=b] (b) {};
\node[contact,info=180:a] (a) at(-2,1.5) {};
\node[draw,circle,inner sep =1pt] (V) at (-1,1.5) {\footnotesize V};
\draw (a) -- (V);
\draw (V) -| (b);
\draw (L1) -| (a);
\draw (a) |- (battery);
\end{tikzpicture}
\end{document}